339 citations · 1.6k across the 37 of their papers we have counts for
38 papers
Euclidean-to-Lorentzian wormhole transition and gravitational symmetry breaking in the Sachdev-Ye-Kitaev model
Antonio M. García-García, Victor Godet, Can Yin +1
We study a two-site Sachdev-Ye-Kitaev model with complex couplings and a weak inter-site interaction. At low temperatures, the system is dual to a Euclidean wormhole in Jackiw-Teit…
Replica Symmetry Breaking in Random Non-Hermitian Systems
Antonio M. García-García, Yiyang Jia, Dario Rosa +1
Recent studies have revealed intriguing similarities between the contribution of wormholes to the gravitational path integral and the phenomenon of replica symmetry breaking observ…
Tuning Superinductors by Quantum Coherence Effects for Enhancing Quantum Computing
Bo Fan, Abhisek Samanta, Antonio M. García-García
Research on spatially inhomogeneous weakly-coupled superconductors has recently received a boost of interest because of the experimental observation of a dramatic enhancement of th…
Symmetry Classification and Universality in Non-Hermitian Many-Body Quantum Chaos by the Sachdev-Ye-Kitaev Model
Antonio M. García-García, Lucas Sá, Jacobus J. M. Verbaarschot
Spectral correlations are a powerful tool to study the dynamics of quantum many-body systems. For Hermitian Hamiltonians, quantum chaotic motion is related to random matrix theory…
Half-wormholes in nearly AdS holography
Antonio M. García-García, Victor Godet
We find half-wormhole solutions in Jackiw-Teitelboim gravity by allowing the geometry to end on a spacetime D-brane with specific boundary conditions. This theory also contains a E…
Characterization of collective excitations in weakly-coupled disordered superconductors
Bo Fan, Abhisek Samanta, Antonio M. García-García
Isolated islands in two-dimensional strongly-disordered and strongly-coupled superconductors become optically active inducing sub-gap collective excitations in the ac conductivity.…
-Laguerre spectral density and quantum chaos in the Wishart-Sachdev-Ye-Kitaev model
Lucas Sá, Antonio M. García-García
We study the Wishart-Sachdev-Ye-Kitaev (WSYK) model consisting of two -body Sachdev-Ye-Kitaev (SYK) models with general complex couplings, one the Hermitian conjugate of t…
Replica Symmetry Breaking and Phase Transitions in a PT Symmetric Sachdev-Ye-Kitaev Model
Antonio M. García-García, Yiyang Jia, Dario Rosa +1
We show that the low temperature phase of a conjugate pair of uncoupled, quantum chaotic, nonhermitian systems such as the Sachdev-Ye-Kitaev (SYK) model or the Ginibre ensemble of…
Euclidean wormhole in the SYK model
Antonio M. García-García, Victor Godet
We study a two-site Sachdev-Ye-Kitaev (SYK) model with complex couplings, and identify a low temperature transition to a gapped phase characterized by a constant in temperature fre…
Superconductivity at the three-dimensional Anderson metal-insulator transition
Bo Fan, Antonio M. García-García
We study a disordered weakly-coupled superconductor around the Anderson transition by solving numerically the Bogoliubov-de Gennes (BdG) equations in a three dimensional lattice of…
Phase diagram of a two-site coupled complex Sachdev-Ye-Kitaev model
Antonio M. García-García, Jie Ping Zheng, Vaios Ziogas
We study the thermodynamic properties of a two-site coupled complex Sachdev-Ye-Kitaev (SYK) model in the large limit by solving the saddle-point Schwinger-Dyson (SD) equations.…
Sparse Sachdev-Ye-Kitaev model, quantum chaos and gravity duals
Antonio M. García-García, Yiyang Jia, Dario Rosa +1
We study a sparse Sachdev-Ye-Kitaev (SYK) model with Majoranas where only independent matrix elements are non-zero. We identify a minimum for quantum c…
Enhanced, phase coherent, multifractal-like, two-dimensional superconductivity
Bo Fan, Antonio M. García-García
We study the interplay of superconductivity and disorder by solving numerically the Bogoliubov-de-Gennes equations in a two dimensional lattice of size which makes pos…
Quantum Jackiw-Teitelboim gravity, Selberg trace formula, and random matrix theory
Antonio M. García-García, Salomón Zacarías
We show that the partition function of quantum Jackiw-Teitelboim (JT) gravity, including topological fluctuations, is equivalent to the partition function of a Maass-Laplace operat…
Quantum chaos transition in a two-site SYK model dual to an eternal traversable wormhole
Antonio M. García-García, Tomoki Nosaka, Dario Rosa +1
It has been recently proposed by Maldacena and Qi that an eternal traversable wormhole in a two dimensional Anti de Sitter space () is the gravity dual of the low temp…
Universality and Thouless energy in the supersymmetric Sachdev-Ye-Kitaev Model
Antonio M. García-García, Yiyang Jia, Jacobus J. M. Verbaarschot
We investigate the supersymmetric Sachdev-Ye-Kitaev (SYK) model, Majorana fermions with infinite range interactions in dimensions. We have found that, close to the ground…
Generic dynamical features of quenched interacting quantum systems: Survival probability, density imbalance and out-of-time-ordered correlator
E. J. Torres-Herrera, Antonio M. García-García, Lea F. Santos
We study numerically and analytically the quench dynamics of isolated many-body quantum systems. Using full random matrices from the Gaussian orthogonal ensemble, we obtain analyti…
Analytical Spectral Density of the Sachdev-Ye-Kitaev Model at finite N
Antonio M. García-García, Jacobus J. M. Verbaarschot
We show analytically that the spectral density of the -body Sachdeev-Ye-Kitaev (SYK) model agrees with that of Q-Hermite polynomials with Q a non-trivial function of a…
Spectral and thermodynamic properties of the Sachdev-Ye-Kitaev model
Antonio M. García-García, Jacobus J. M. Verbaarschot
We study spectral and thermodynamic properties of the Sachdev-Ye-Kitaev model, a variant of the -body embedded random ensembles studied for several decades in the context of nuc…
Understanding and enhancing superconductivity in FeSe/STO by quantum size effects
Bruno Murta, Antonio M. García-García
Superconductivity in one-atom-layer iron selenide (FeSe) on a strontium titanate (STO) substrate is enhanced by almost an order of magnitude with respect to bulk FeSe. There is rec…
Anomalous Thouless energy and critical statistics on the metallic side of the many-body localization transition
Corentin L. Bertrand, Antonio M. García-García
We study a one-dimensional (1d) XXZ spin-chain in a random field on the metallic side of the many-body localization transition by level statistics. For a fixed interaction, and int…
Transport in a gravity dual with a varying gravitational coupling constant
Antonio M. García-García, Bruno Loureiro, Aurelio Romero-Bermúdez
We study asymptotically AdS Brans-Dicke (BD) backgrounds, where the Ricci tensor R is coupled to a scalar in the radial dimension, as effective models of metals with a varying coup…
Marginal and Irrelevant Disorder in Einstein-Maxwell backgrounds
Antonio M. García-García, Bruno Loureiro
We study analytically the effect of a weak random chemical potential of zero average in an Einstein-Maxwell background. For uncorrelated disorder this perturbation is relevant howe…
Drude weight and Mazur-Suzuki bounds in holography
Antonio M. García-García, Aurelio Romero-Bermúdez
We investigate the Drude weight and the related Mazur-Suzuki (MS) bound in a broad variety of strongly coupled field theories with a gravity dual at finite temperature and chemical…